/*
 * StorageManager.cpp
 *
 * Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "StorageManager.h"
#include "StorageBackend.h"

#include <boost/thread/locks.hpp>

namespace Mad {
namespace Common {

void StorageManager::setBackend(boost::shared_ptr<StorageBackend> newBackend) {
  boost::lock_guard<boost::shared_mutex> lock(mutex);
  backend = newBackend;
}

void StorageManager::unsetBackend(boost::shared_ptr<StorageBackend> oldBackend) {
  boost::lock_guard<boost::shared_mutex> lock(mutex);
  if(backend == oldBackend)
    backend.reset();
}

std::set<Core::String> StorageManager::listTypes() throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
  if(!backend)
    throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

  return backend->listTypes();
}

std::set<Core::String> StorageManager::list(const Core::String &type) throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
  if(!backend)
    throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

  return backend->list(type);
}

bool StorageManager::exists(const Core::String &type, const Core::String &name) throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
    if(!backend)
      throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

    return backend->exists(type, name);
}

void StorageManager::store(const Core::String &type, const Core::String &name, const XmlData *data) throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
  if(!backend)
    throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

  backend->store(type, name, data);
}

boost::shared_ptr<XmlData> StorageManager::load(const Core::String &type, const Core::String &name) throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
  if(!backend)
    throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

  return backend->load(type, name);
}

void StorageManager::copy(const Core::String &type, const Core::String &name, const Core::String &newName) throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
  if(!backend)
    throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

  backend->copy(type, name, newName);
}

void StorageManager::rename(const Core::String &type, const Core::String &name, const Core::String &newName) throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
  if(!backend)
    throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

  backend->rename(type, name, newName);
}

void StorageManager::remove(const Core::String &type, const Core::String &name) throw (Core::Exception) {
  boost::shared_lock<boost::shared_mutex> lock(mutex);
  if(!backend)
    throw Core::Exception(Core::Exception::NOT_IMPLEMENTED);

  backend->remove(type, name);
}

}
}